Patents by Inventor Marc Laugeois
Marc Laugeois has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20230231748Abstract: A processing method in a wireless telecommunications receiver receiving a digitally modulated single-carrier signal includes, between a matched filter, in the time domain, operating at a frequency drx×B and a frequency equalizer, operating at the frequency B, a decimation step comprising: i/extracting, from a filtered signal frame, a first sequence of samples for aiding the decimation and having the same power; and a second sequence of payload samples intended to be equalized; ii/estimating the variance in the power of each of the drx decimation phases of the first sequence and identifying the nth decimation phase associated with the minimum variance; iii/decimating the second sequence by selecting the nth decimation phase of the second sequence and supplying the decimation phase at the input of the frequency equalizer.Type: ApplicationFiled: January 6, 2023Publication date: July 20, 2023Inventors: Nicolas CASSIAU, Marc LAUGEOIS
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Publication number: 20210409254Abstract: An OFDM modulator including a predistortion module configured to receive the N consecutive data carriers and configured to compensate for distortion subsequently introduced by a polyphase filter bank connectable to the output of the OFDM modulator, a transformation module configured to apply a discrete inverse Fourier transform of constant size NIDFT independently of the numbering and transmission band used by the OFDM transmitter including the OFDM modulator, a filling module, the input of which is connected to the output of the predistortion module, and the output of which is connected to the input of the transformation module, and configured to insert (NIDFT?Nc) null carriers in succession to the Nc consecutive data carriers independently of the parity of the index i associated with the OFDM modulator.Type: ApplicationFiled: June 17, 2021Publication date: December 30, 2021Applicant: Commissariat å l'ênergie atomique et aux énergies alternativesInventors: Nicolas CASSIAU, Marc LAUGEOIS
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Patent number: 10763980Abstract: A calibration method for calibrating a reception chain comprising an input amplifier of an analogue-to-digital converter, and including the following successive steps: determining a rest gain as a function of the average power of the noise present on a digital signal from said converter; and setting the gain of the input amplifier at said rest gain when the average power of said digital signal is lower than a first threshold.Type: GrantFiled: July 12, 2019Date of Patent: September 1, 2020Assignee: Commissariat à l'Énergie Atomique et aux Énergies AlternativesInventor: Marc Laugeois
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Publication number: 20200021371Abstract: A calibration method for calibrating a reception chain comprising an input amplifier of an analogue-to-digital converter, and including the following successive steps: determining a rest gain as a function of the average power of the noise present on a digital signal from said converter; and setting the gain of the input amplifier at said rest gain when the average power of said digital signal is lower than a first threshold.Type: ApplicationFiled: July 12, 2019Publication date: January 16, 2020Applicant: Commissariat à I'Énergie Atomique et aux Énergies AlternativesInventor: MARC LAUGEOIS
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Patent number: 10511431Abstract: A method of synchronising a communication signal entering into a receiver. Each frame of the signal includes a learning symbol formed of N repetitions of a learning sequence. The method includes the determination of a total correlation signal by correlating the input signal with a correlation symbol formed of N repetitions of a correlation sequence corresponding to all or part of the learning sequence and duration tsc, and the determination of a partial correlation signal by correlating the input signal with the correlation sequence. A peak of the total correlation signal is identified at an instant tpct. At least one threshold is defined from the power of the peak of the total correlation signal, and the power of the partial correlation signal is compared here to the instants tpct?k*tsc, with k a whole number between 0 and N?1.Type: GrantFiled: October 1, 2018Date of Patent: December 17, 2019Assignee: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESInventor: Marc Laugeois
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Patent number: 10498455Abstract: This invention relates to an emitter for an optical communication system such as a Li-Fi system. This emitter comprises an M-PAM modulator and a conversion module to convert an M-PAM symbol into a plurality of logical outputs. It also comprises a plurality of branches in parallel, each branch comprising a switched current source mounted in series with the optical source, each switched current source being controlled by a logical output from the conversion module.Type: GrantFiled: June 12, 2018Date of Patent: December 3, 2019Assignee: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESInventors: Luc Maret, Marc Laugeois, Xavier Popon
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Publication number: 20190109698Abstract: A method of synchronising a communication signal entering into a receiver. Each frame of the signal includes a learning symbol formed of N repetitions of a learning sequence. The method includes the determination of a total correlation signal by correlating the input signal with a correlation symbol formed of N repetitions of a correlation sequence corresponding to all or part of the learning sequence and duration tsc, and the determination of a partial correlation signal by correlating the input signal with the correlation sequence. A peak of the total correlation signal is identified at an instant tpct. At least one threshold is defined from the power of the peak of the total correlation signal, and the power of the partial correlation signal is compared here to the instants tpct?k*tsc, with k a whole number between 0 and N?1.Type: ApplicationFiled: October 1, 2018Publication date: April 11, 2019Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES AL TERNATIVESInventor: Marc LAUGEOIS
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Publication number: 20180359034Abstract: This invention relates to an emitter for an optical communication system such as a Li-Fi system. This emitter comprises an M-PAM modulator and a conversion module to convert an M-PAM symbol into a plurality of logical outputs. It also comprises a plurality of branches in parallel, each branch comprising a switched current source mounted in series with the optical source, each switched current source being controlled by a logical output from the conversion module.Type: ApplicationFiled: June 12, 2018Publication date: December 13, 2018Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESInventors: Luc MARET, Marc LAUGEOIS, Xavier POPON
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Patent number: 9197310Abstract: The invention relates to a receiver of a signal built as successive frames, comprising a plurality of antennas, a signal receiving chain associated with each antenna, and a power amplifier on each receiving chain to which is applied a gain set point provided by a gain control unit characterized in that it comprises an antenna selecting unit configured to select one antenna from the plurality of antennas, and a time synchronizing unit configured to determine the frame start and end times in the signal received by the selected antenna. The antenna selecting unit is further configured to assess the gain set point of each receiving chain and to eliminate from the selection each antenna associated to a receiving chain which gain set point in not in a steady state.Type: GrantFiled: December 29, 2014Date of Patent: November 24, 2015Assignee: Commissariat à l'énergie atomique et aux énergies alternativesInventor: Marc Laugeois
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Publication number: 20150195029Abstract: The invention relates to a receiver of a signal built as successive frames, comprising a plurality of antennas, a signal receiving chain associated with each antenna, and a power amplifier on each receiving chain to which is applied a gain set point provided by a gain control unit characterized in that it comprises an antenna selecting unit configured to select one antenna from the plurality of antennas, and a time synchronizing unit configured to determine the frame start and end times in the signal received by the selected antenna. The antenna selecting unit is further configured to assess the gain set point of each receiving chain and to eliminate from the selection each antenna associated to a receiving chain which gain set point in not in a steady state.Type: ApplicationFiled: December 29, 2014Publication date: July 9, 2015Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENE ALTInventor: Marc Laugeois
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Patent number: 7633997Abstract: The invention relates to a device for exchanging digital data between several sources and at least one hub in a CDMA system, characterised in that it comprises a number n of digital transmission/reception circuits (1) installed in parallel, each circuit (1) comprising a transmitter (2i) comprising means of generating an integer number Nc of codes that will be used for spectral spreading of data to be transmitted and a receiver (4i) comprising means (46, 48) of detecting the access of new sources to the CDMA system transmission channel and means (49) of generating synchronisation signals and power control signals corresponding to each detected new source.Type: GrantFiled: May 15, 2008Date of Patent: December 15, 2009Assignee: Commissariat a l'Energie AtomiqueInventors: Didier Lattard, Didier Varreau, Bernard Piaget, Marc Laugeois
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Publication number: 20080219284Abstract: The invention relates to a device for exchanging digital data between several sources and at least one hub in a CDMA system, characterised in that it comprises a number n of digital transmission/reception circuits (1) installed in parallel, each circuit (1) comprising a transmitter (2i) comprising means of generating an integer number Nc of codes that will be used for spectral spreading of data to be transmitted and a receiver (4i) comprising means (46, 48) of detecting the access of new sources to the CDMA system transmission channel and means (49) of generating synchronisation signals and power control signals corresponding to each detected new source.Type: ApplicationFiled: May 15, 2008Publication date: September 11, 2008Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUEInventors: Didier Lattard, Didier Varreau, Bernard Piaget, Marc Laugeois
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Patent number: 7391806Abstract: The invention relates to a device for exchanging digital data between several sources and at least one hub in a CDMA system, characterized in that it comprises a number n of digital transmission/reception circuits (1) installed in parallel, each circuit (1) comprising a transmitter (2i) comprising means of generating an integer number Nc of codes that will be used for spectral spreading of data to be transmitted and a receiver (4i) comprising means (46, 48) of detecting the access of new sources to the CDMA system transmission channel and means (49) of generating synchronization signals and power control signals corresponding to each detected new source.Type: GrantFiled: December 27, 2001Date of Patent: June 24, 2008Assignee: Commissariat a l'Energie AtomiqueInventors: Didier Lattard, Didier Varreau, Bernard Piaget, Marc Laugeois
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Patent number: 7095818Abstract: A data transmission process with auto-synchronised correcting code, auto-synchronised coder and decoder, corresponding transmitter and receiver. According to the invention, synchronisation management signals (HS, SS, ID) are formed and, under the control of these signals, a header is inserted before a data group and after it a correcting code. At receive end, these synchronisation management signals are reconstituted, the presence of a header is detected and any erroneous symbols are corrected. The invention also provides for an auto-synchronised coder and a decoder and for a transmitter and a receiver using them.Type: GrantFiled: June 12, 2001Date of Patent: August 22, 2006Inventors: Marc Laugeois, Didier Lattard, Jean-Remi Savel, Bouvier des Noes Mathieu
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Publication number: 20040047315Abstract: The invention relates to a device for exchanging digital data between several sources and at least one hub in a CDMA system, characterised in that it comprises a number n of digital transmission/reception circuits (1) installed in parallel, each circuit (1) comprising a transmitter (2i) comprising means of generating an integer number Nc of codes that will be used for spectral spreading of data to be transmitted and a receiver (4i) comprising means (46, 48) of detecting the access of new sources to the CDMA system transmission channel and means (49) of generating synchronisation signals and power control signals corresponding to each detected new source.Type: ApplicationFiled: June 19, 2003Publication date: March 11, 2004Inventors: Didier Lattard, Didier Varreau, Bernard Piaget, Marc Laugeois
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Publication number: 20020004405Abstract: A data transmission process with auto-synchronised correcting code, auto-synchronised coder and decoder, corresponding transmitter and receiver.Type: ApplicationFiled: June 12, 2001Publication date: January 10, 2002Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUEInventors: Marc Laugeois, Didier Lattard, Jean-Remi Savel, Mathieu Bouvier des Noes
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Patent number: RE41774Abstract: A data transmission process with auto-synchronised correcting code, auto-synchronised coder and decoder, corresponding transmitter and receiver. According to the invention, synchronisation management signals (HS, SS, ID) are formed and, under the control of these signals, a header is inserted before a data group and after it a correcting code. At receive end, these synchronisation management signals are reconstituted, the presence of a header is detected and any erroneous symbols are corrected. The invention also provides for an auto-synchronised coder and a decoder and for a transmitter and a receiver using them.Type: GrantFiled: November 22, 2006Date of Patent: September 28, 2010Assignee: Commissariat a l'Energie AtomiqueInventors: Marc Laugeois, Didier Lattard, Jean-Remy Savel, Mathieu Bouvier des Noes
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Patent number: RE43204Abstract: A data transmission process with auto-synchronised correcting code, auto-synchronised coder and decoder, corresponding transmitter and receiver. According to the invention, synchronisation management signals (HS, SS, ID) are formed and, under the control of these signals, a header is inserted before a data group and after it a correcting code. At receive end, these synchronisation management signals are reconstituted, the presence of a header is detected and any erroneous symbols are corrected. The invention also provides for an auto-synchronised coder and a decoder and for a transmitter and a receiver using them.Type: GrantFiled: September 11, 2009Date of Patent: February 21, 2012Assignee: Xantima LLCInventors: Marc Laugeois, Didier Lattard, Jene-Remi Savel, Mathieu Bouvier Des Noes